3
IMPORTANT SAFETY INFORMATION
Please read all instructions before servicing this equipment.
Pay attention to all safety warnings and any other special
notes highlighted in the manual. Safety markings are
used frequently throughout this manual to designate a
degree or level of seriousness and should not be ignored.
WARNING indicates a potentially hazardous situation that
if not avoided, could result in personal injury or death.
CAUTION indicates a potentially hazardous situation that
if not avoided, may result in minor or moderate injury or
property damage.
REQUIREMENTS & CODES
WARNING:
The information listed below must be followed
during the installation, service, and operation
of this furnace. Failure to follow safety
recommendations could result in possible
damage to the equipment, serious personal
injury or death.
• This furnace must be installed in accordance with
these instructions, all applicable local building codes
and the current revision of the National Fuel Gas Code
(NFPA54/ANSI Z223.1) or the Natural Gas and Propane
Installation Code, CAN/CGA B149.1.
CE générateur d’air chaud doit être installé conformément
aux instructions du fabricant et aux codes locaux. En
l’absence de code local, respecter la norme ANSI
Z223.,1, institulé National Fuel Gas Code ou les codes
d’installation CAN/GCA-B149.
• Use only with type of gas approved for this furnace.
Refer to the furnace rating plate.
• Install this furnace in accordance to the minimum
clearances to combustible materials shown in
.
• Provide adequate combustion and ventilation air to the
• Provide adequate clearances around the vent air intake
terminal as specified in
• Combustion products must be discharged outdoors.
Connect this furnace to an approved vent system only,
as specified on
.
• Never test for gas leaks with an open flame. Use
a commercially available soap solution to check all
connections. See
.
• This furnace is designed to operate with a maximum
external pressure rise of 0.5 inches of water column.
Consult
, and the rating plate for
the proper circulating air flow and temperature rise.
NOTE: It is important that the duct system be designed
to handle the desired flow rate and external pressure
rise. An improperly designed duct system can result in
nuisance shutdowns, and comfort or noise issues.
TROUBLESHOOTING .............................................. 35
MAINTENANCE ........................................................ 35
FIGURES & TABLES ................................................ 37
Figure 41. Furnace Dimensions .......................... 37
Airflow Data .......................................................... 38
Electrical Information ............................................ 39
Figure 42. M4RC & M4RL Wiring Diagram ......... 39
Gas Information .................................................... 40
Table 8. Gas Flow Rates ..................................... 40
Table 9. Gas Pipe Capactities ............................. 40
Table 11. High Altitude Deration Chart for
Natural Gas - High Heating Value ........ 41
Table 10. Natural Gas Heating Values ................. 41
Table 13. High Altitude Deration Chart for
Propane Gas ....................................... 41
Table 12. High Altitude Deration Chart for
Natural Gas - Low Heating Value ......... 41
Venting Information ............................................... 42
Table 14. Vent Termination Clearances ............... 42
Figure 43. Horizontal & Vertical Venting .............. 43
Figure 44. M4RC Series - Upflow Options .......... 44
Figure 45. M4RL Series - Downflow Options ...... 45
FURNACE COMPONENTS ...................................... 46
Summary of Contents for M4RC-072D-35C
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